Metal-crimping machine.



J. WALTER. METAL GRIMPING MACHINE. APPLICATION FIL'BD AUG. 5, 1907.

901,131. Patented 001a. 13;1908.-

3 SHEETS-SHEET 1.

aw modes awuo/wboz LIUHN LI .WAbTER. I

atfozucqo 7H2 uuRR/s #:rsws cc WASHINGTON. 11.

APPLICATION FILED AUG. 5, 1907'.

I Patented Oct. 13,1908.

a SHEETS-SHEET 2.

arrow Patented Oct. 13

3'SHEETS -SHEBT 3.

a LIUHN LI WALTER I u p 4 3 n =1 wlbm m I WW1 v I I. J. WALTER. METAL URIMPING MACHINE. I APPLICATION FILED AUG. 5,1907.

Wvlmeoow UNITED sT TEs PATENT OFFICE.

JOHN JOSEPH WALTER, OF NEW ALBANY, INDIANA.

'" Specification of.Letters"Patent.

e TALCR-IMPING-MACHINE.

"Patented Oct. 13, 1908.

Applicationfiled August 5,1907. =Seria1 No .'387,150.

To alt whom it may concern:

Be llllil'lOWILtlial] I, JOHN JosEPn WALTER,

a citizen of the. UnitedStates, residingsat New Albany, in the Stateof Indiana, have invented certainunew and 'useful Improvements in Metal-Crimping Machines; and I do declare the followingto-be a full, clear,: and

exact description of the invention, suchxas metal-crimping machine.

'The object of the invention isto provide a machinewhich will turna double bent edge in a metal sheetin one operation, thereby economizing at least one-half the time heretofore required formaking a strongwaterproofseam without the use ofsolder.

In the accompanying drawings,-Figure 1 represents afrontelevation of this improved machine showing a sheet of tin after it-has been crimpedp partly removed therefrom; Fig.2 represents an end elevation thereof; Fig. 3 represents a rear elevation ;"Fig.'4 represents a transversesection with-the plunger in operation bending axsheet; Fig. 5. represents a top plan view of the machine.

. In the embodiment illustrated, end supports 1 and 2 are shown having oppositely disposed obliquely arranged slots, as 3, in which are mounted bearingends 4.and 5 of a transversely sliding plunger 6, having its upper front edge beveled at 7. This plunger 6 is mounted between inclined guides, the lower one 8, of which is formed of an obliquely disposed cross bar, which extends the entire length of the plunger and is fixedly secured at its opposite ends to two members 15 and 16 pivotally connected at one end at 15' to the end supports 1 and 2, and the upper edge of this bar 8 is beveled to fit the beveled edge of a mandrel hereinafter described. The upper guide is formed of strips, as 9, which are also mounted on the pivoted members 15 and 16 and arranged parallel with the ends of the board .8 and spaced therefrom a suflicient distance to receive the ends of the plunger'6- and permit it to slide freely therebetween. Extending from the ends of the plunger 6 and projecting through the members 15 and 16 and slots as Sin the end members are two bearing studs, as 10, on which are mounted two levers, as 11, pivotally connected at one end to the supports 1 and 2. Levers as 12' are pivotally connected at one end with the lower ends of the levers as 11. These levers 13S 12 are pivoted 'ec'centrically at their other ends to the outer ends ofstub shafts Band 14 revolubly mounted in bearings in the members 15 and 16. .The inner ends of these shafts 13 and 141l1ave cam disks or members 117 and 18 fixed thereto, and these disks are provided with laterally extending arms 1 9 and .20 to which a folding member or leaf 21 is secured at: its ends. 1Thisleaf 21 hasahandle 22 vfor. raising andslowering it. The cam .dislo 18, its: adjacent shaft and the member .15 are provided-with a radially extending cut-out portion 18 topermit the metal sheet after it isbent -to-be slipped out longitudinally therethrough.

Supported in the end members 1 and 2'be- 14 are two roller bearings 23 and 24 on which the camdisks 17 and 18' rotate. .A stop bar 25 is arranged acrossthe machine to limit the downward; movement of the leaf 2 1.

"Secured intermediate of its. ends to the plunger6 is: a longitudinally arrangedleafespring'26, theufreeaeiids of-whioh bear on the free ends oftwo: pivoted levers 27. and 28, arranged at opposite ends of the plunger to .holdlsaidlevers against the plungerrto provide the proper tension therefor.

.A mandrel 80: is fixed to the end members "1vand2. and has: its lower edge beveled at the rearside thereof, saidbeveled portion terminating in a laterally extending flange 31, which is preferably formed by cutting away the inner face of the mandrel above said flange. This mandrel 30 is arranged above and spaced from the board 8 with its lower front edge arranged adjacent the inner edge of the leaf 21, but spaced therefrom a sufficient distance to permit a sheet of tin or other metal'to be crimped to be inserted between said leaf and the lower edge of the mandrel. The inner edge of the flange 31 of the mandrel is arranged adjacent the beveled edge of the plunger 6, and said plunger is adapted to ride over said flange when the machine is in operation.

In the use of this machine the sheet of metal is slip ed in between the lower edge of the mandrel 30 and the up er edge of the clamping board 8 and exten s over the beveled edge of the plunger at the distance which is desired to form the first bend near the edge thereof. The leaf 21 is then raised upwardly, which causes the earns 17 and 18 to ride on the rollers 23 and 24 and lift the pivoted members 15 and 16, thereby causing lowthe leafbearings .or stubshafts 13: and

the beveled edge of the board 8 to clamp the metal sheet between it and the mandrel and securely hold it in position while being bent. At the same time the plunger 6 is moved forwardly over the flange 31 on the mandrel 30 by means of the levers heretofore described, and a double bend is formed in the metal sheet by the edges of the plunger 6 and of the leaf 21, as is clearly shown in Fig. 4, the sheet being folded upon itself and the edge of said folded portion turned under or inward to form a hem-like bend.

I claim as my invention z- 1. In a metal crimping machine, the combination of a supporting frame, an obliquely disposed mandrel mounted in said frame and having its lower edge beveled on the rear face thereof, said beveled face terminating in a forwardly extending lateral flange, an obliquely disposed plunger mounted to move at right angles to the rear face of said mandrel and slidable over the flange thereof, and a folding member mounted to cooperate with the front edge of said mandrel to form one bend in the metal sheet, being operated on and connected to operate said plunger in forming another bend.

2. In a metal crimping machine, the combination of a supporting frame, an obliquely disposed. mandrel mounted in said. frame and having its lower edge beveled. on the rear face thereof, said beveled face terminating in a forwardly extending lateral flange having a downwardly inclined lower face, an obliquely disposed plunger mounted to move at right angles to the rear face of said mandrel and slidable over the flange thereof, a folding member mounted to cooperate with the front edge of said mandrel to form one bend in the metal sheet, being operated on and connected to operate said plunger in. forming another bend, and a slot formed in one side of the frame to permit the removal of the metal sheet longitudinally there through after crimping thereof.

3. In a metal crimping machine, the combination of spaced end supports having downwardly and rearwardly inclined. ob liquely arranged slots, a plunger arranged to move between said supports and having studs projecting through said slots, levers pivoted at one end to the outer faces of said supports and connected with said studs, a folding member journaled in said. supports, links connected at one end to the front ends of said levers and at the other end with said folding member, and a mandrel arranged above and between said folding member and plunger.

4. In a metal crimping machine, the com bination of spaced end supports, a plunger mounted to slide obliquely between said supports, levers pivoted. at one end to said supports with their free ends bearing on said plunger, a spring member secured intermediately of its ends to said. plunger and bea ring on the free ends of said. levers, a mandrel arranged above and adjacent to the upper edge of said. plunger, a vertically movable folding member arranged. to cooperate with said mandrel in forming a bend in the metal to be crimpcd, and means connecting said folding member and plunger.

In testimony whereof I have hereunto set my hand in presence of two subscribing wil- JOHN JOSEPH \VAIIIER. Witnesses:

JOHN HORN, L. L. BRADLEY.

, IIGSSGS. 

